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GIRDER-ERECTION EQUIPMENT--OVERHEAD CRANE TYPE

On the Shinkansen line the proportion of viaducts has been increasing and 49% of the track of the Tohoku and the Joetsu Shinkansen now under construction is taken up by viaducts. Up to the present time, the viaducts built were rigid frame concrete structures. Recently girder erection equipment of the overhead crane type has been perfected and is described in this article.